Q 55 Which has greater lowering of vapour pressure 1) 0 1 m Urea 2) 0 1 m - Chemistry - States of Matter

Question

Q 55 Which has greater lowering of vapour pressure?
1) 0 1 m Urea
2) 0 1 m Glucose
3) 0 1 m Sucrose
4) equal in all cases

Kanika Khandelwal · Accepted Answer

Dear student,
Lowering of vapour pressure is a colligative
property & depends on the no of dissolved solute
particles According to its formula,it also depends on the mole
fraction of solute But since all 3 solutions have equal molality of
0 1 m, this factor need not be accounted
Since, urea,glucose and sucrose, all are
non-electrolytes and do not ionise into ions when
dissolved in water,they will have only 1 particles Hence all will
have same lowering of vapour pressure
Correct option is 4
Regards

Q.55. Which has greater lowering of vapour pressure? 1) 0.1 m Urea 2) 0.1 m Glucose 3) 0.1 m Sucrose 4) equal in all cases

Q.55. Which has greater lowering of vapour pressure?
1) 0.1 m Urea
2) 0.1 m Glucose
3) 0.1 m Sucrose
4) equal in all cases